The saddest thing about this offer is that it is limited to only subscribers who are on MTN beta talk and if you really want to enjoy this offer then i guess you need to migrate back to MTN Beta Talk now, you can do so by dialing *123*2*6# to get on the tariff plan.

Now after successfully migrating to MTN Beta Talk you just need to activate the plan which i will give out below. this is the message i received from my MTN line: "Special Offer! Get 12mins to call all networks in Nigeria & 100MB data. Recharge N100 & text J11 to 142 NOW! Val/7 days. Dial *559*60# to view bundle balance"

How to Buy 100MB for Just N100
After migrating to MTN beta talk using the above code provide, now send sms J11 to 142 and you will received a successful message like this: "Dear Customer, you have received 12Mins for National calls & 100MB. Bundle is valid for 7days. Dial *559*60# to view your bundle balance."

How to Buy 50MB for Just N50
Sms J12 to 142 to subscribe for 50MB for just N50

Enjoy while it last and don't forget that you must be on Beta Talk to enjoy this offer and check your data by dialling *559*60#

Source: http://www.wikiban.com/2016/05/new-data-offer-get-100mb-for-n100-50mb.html

It's working fine on ipulse. It depends on sim eligibility.